Protective device for printing-presses or the like.



W. Y. DEAR & E. S. COLE. PROTECTIVE DEVICE ron PRINTING PBESSES OR THE LIKE. APPLIOATIOI IILED JULY 11, 1911'.

1,071,608, Patented Aug. 26, 1913.

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PMIEGTIVE DEVICE I EIMIM-PBESSES ,OR THE mammal otmm shtnt. Patented Aug. 26,1913.

hpl'ication filed Iuly 11, 1911. Serial Zita. "637,91t.

To all whom it may concern:

-Be it known that we, WILLIAM Y. DEAR and EDWIN S. Conn citizens of'the United in the city of Jersey City,

and State of New J ersey, have invented certain new and useful Improvements in Protective Devices for Printing-Presses or the Like, of which the following is a specification.

Ourinvention relates to mechanism for protecting printing presses or like apparatus through which a continuous ribbon of material passes from injury due to the breaking of such ribbon, and also for minimizing the damage to the ribbon when such a break occurs.

Our improved device is particularly apcounty of Hu son,

rollers in juxtaposition or etween guides and rollers.

In printing presses it is not unusual to have the paper break after being threaded through the press, and the press started, thus causing a loss in time while the paper is reand a further loss of material due and, during such further operation destroys fresh material which would have been saved had the press been stopped at the moment the break in the paper occurred. The greatest likelihood of damage, however, arises from the fact that where the pa er passes between two adjacent rollers or etween a guide and a roller, and a break occurs,the paper will not continue on smoothly as before between therollers or between the guide and adjacent roller, but will bunch up between the two surfaces, forming a compressed mass of paper which is finally seized by the revolving rollers and carried ate,

between them or between the roller and is a side elevation of asses between If for any reason fed through the machine, but also doing away with a to the mechanical parts of the press.

7 In the accompanying drawings which form apart of t is specification, Figure 1 our improved device showing the parts in the position which they assume when the paper breaks and bunches between rollers or guides; Fig. 2 is a diagrammatic view of a portion of the printing press showing'our improved apparatus applied thereto and illustrating the electrical circuits whic are utilized for the purpose of stopping the press when the paper breaks. Referring to the drawings in detail, the numeral 1 designates a rod forming an integral part of the machine, upon which is mounted ,a guide 2. A similar rod 3 carries the guide 4, and between these two uides the paper 5 is fed. The paper is s own as being fed from a plurality of feeding rollers, from whence it passes between the longitudinal cutting cylinders 6, thence through the guide rollers 7 and the guides 2 and {i to the collecting cylinder 8, from which it is led to the jaw cylinder 9, the

endless belt 10- being provided for causing the paper to alinev itself properly upon the collectin c linder. Mounted upon the rod 1' is a 'sp it lock 11 of any suitable material which is a conductor of electricity, the two halves of the block being clamped to the rod by means of the screws 12, or in any other suitable manner. Hinged at 13 to the projecting arm 14: of the lower half of the block is a contact strip 15 of any suitable material which is'a conductor of electricity. The other extremity of this contact strip is formed-into a hook 16 and the parts are so arranged with respect to each other that gravity will normally cause the strip to fall into the position indicatedby the dotted lines in Fig. 1, the end of the hook 16 engaging the' arm 17 on the other end of the lower portion of the split block. When the contact strip is in this position, suflicient space is provlded between the lower surface of -he strip and the upper surface of the lower guide 4 to permit the passage of the paper therebetween.

possibility of seriousinjury the'paper breaks in the i vicinity of the guides and 4, it will tend to vbunchu as indicated at 18 in Fig. 1,

owing to t shot that the tension in the paper is released, and the paper no longer the screw 20, the washer 21 and bushing22 of fiber, or otheriinsulator, being pro'vlded for preventin electrical contact between the 85%19 and t e lower half of the block. en the paper breaks and bunches'up, as indicated in Fig. 1, it closes an electrical I "circuit through contact strip 15-, strip 19,

wire 23,"solenoid 24,01' other device for closing a secondary electric circuit 25, 26; wire 27, battery-or other source of electro-motive force 28, wire 29, lamp 30, wire 31 and block 11, which is in electrical contact with the contact strip 15through the hinge 13. The closing of this circuitcauses the lamp 30 to light, and through the action of the solenoid 24, or'other suitable mechanism, causes a change in the condition of the secondary or auxiliary electric circuit, 25, 26, which is connectui with any standard type of press stopping device, and thus causes the press to stop. Such devices are well known in the art and it is not' considered necessary to describe their operation. here. It is obvious that the stop mechanism may be caused to operate either by the opening of the circuit 25, 26- or by the closing thereof, the result, the stopping of the press, being the same in' either case. I

Since in a largepress such, for example, as that used for news aper work there may be man points at which the paper is likely to 'brea andsince it is desirable to stop the press upon the immediate breakin the aper, the press may be equipped with a num r of protective devices connected in parallel across the circuit, as illustrated by the wire 32, connected to the main circuit at 33, and the wire 34 connected to the main thus be remedied at once without loss of time circuit at 35. A tell-tale lamp 36 is connected in each of such auxiliary circuits for the purpose of indicatin at once to the ress operator whe'i'e the trou 1e lies. It w1 be seen that in case any one of the protective devices operates the press will stop, but only the particular tell-tale light in the circuit of that device will light. The 'trouble may in searching .for the break in the paper.

While we have described the application of our deviceto a printing press, it will be obvious that such a protective mechanism will be useful in combination with many other machines in which a flexible material fed therethrough is liable to breakage. We therefore do not wish to be limited to the ap' lication shown, nor to the particular form said material, an abutting shoulder 'on said block, a hook on the free end of said arm held by gravity in normal contact with said shoulder slightly above the surface of said material, an electrical contact on saidblock,

and an electrical contact on said arm adapted to be brought into operative engagement bythe oscillation of said arm about its huge.

2. A stop device for printing the like comprising a supportin mounted adjacent to guides through which the material fed through the press is led, an arm hinged to said support and capable resses or P block of pivotal movement in a plane substantially v perpendicular to the surface of said material, said arm being normally vforced by gravity into a position adjacent to said surace, an abutting shoulder on said support, a hook ,on the free end of said arm engaging saidshoulder and thereby limitin the travel of said arm in a direction towa said material, an electrical contact on said block, and a second electrical contact on said arm adapted to engage the firstwhen the arm is displaced from its normal position.

3. A rotective device for printing presses or the ike comprising a supporting blockv mounted adjacent to guides through which the material fed through the press is led, an arm hinged to said support and forming a portion 0 an electrical circuit operatin a stop mechanism for said press, said arm ing capable of movement in a plane substantially perpendicular to the surface of said material, an abutting shoulder, a hook on the free end of said arm adapted to engage said shoulder and normally to be held y gravity against the same in close proximity to the surface of said material, a stationary electrical contact formin a part of said circuit but normally insu ated from said arm, the circuit being closed'through said-contact and said arm when the latter is displaced from its normal position.

4. In' a web printing press, means for operatinga stop device for said press, said means includin an electrical circuit for operating-said evice, a plurality of contact makers connected in shunt across said circuit and mounted on said press at diflerent points in the line of progress of the material fed through the press, each of said devices including'an arm capable of move,-

ment controllable by buckling of the material and normally supported in close proximity thereto, said arm forming a part of said shunt circuit, a fixed electrical contact also connected in said circuit and normally insulated from said arm, said arm and contact being so disposed that the displacement of said arm will complete said shunt circuit,

and an indicating device in each of said shunt circuits.

WILLIAM Y. DEAR. EDWIN S. COLE.

Witnesses:

GERALD E. TERWILLIGER, JOHN S. WATSON. 

